Implement coupling



en. 319 1950 P. HENRIOD 2,534,971

IMPLEMENT COUPLING Filed Dec. 28, 1945 3 Sheets-Sheet 1 Dem 19, 1950 P. HENRIQD 2,534,971

IMPLEMENT COUPLING Filed Dec. 28, 1945 s Sheets-Sheet 2 Dec, 9 @950 P. HENRIOD 2,534,971

IMPLEMENT COUPLING Filed Dec. 28, 1945 3 Sheets-Sheet 3 IN VF/V 70,9

P604 M r/Wop Patented Dec. 19, 1950 UNITED STATES IMPLEMENT COUPLING Paul Henriod, Vaud, Switzerland Application December 28, 1945, Serial No. 637,639 In France October 20, 1945 1 Claim.

This invention relates to ploughs and more particularly to double-share ploughs which have to be turned around at the end of a furrow. The invention refers especially, though not exclusively, to power driven ploughs.

The principal object of this invention is to provide means permitting the plough to be raised or lowered.

Another object of this invention is to provide means afiording the adjustment of the position of the plough beam so as to permit the breadth of the furrow to be varied.

A further object of this invention is to provide a plough of the aforesaid type wherein an eccentric device disposed on the tractor and driven by the engine of the latter acts on traction means so as to ensure the lifting or raising of the whole plough prior to its return at the end of a furrow.

In accomplishing these and other objects of this invention, I have provided the improved details of construction the preferred forms of which are illustrated in the accompanying drawings wherein:

Fig. 1 is a side elevational view of the device made in accordance with the invention for adjusting the height of the plough,

Fig. 2 is a plan view of the device shown in Fig. 1,

Fig. 3 is a section taken along line AA' of Fig. 1-,

Fig. 4 is a fragmentary sectional view of the attaching means shown in Figs. 2 and 3,

Fig. 5 is a side elevational view illustrating the device for turning the plough,

Fig. 6 is a plan view of the device of Fig. 5,

Fig. 7 is a side elevational view of the lifting device,

Fig. 8 is a plan view of the device of Fig. 7,

.Fig. 9 is a perspective view of the plough emb'odying the invention.

5 Referring to Figs. 1 to 4, the beam 1 of the plough is pivotally fitted in a sleeve 2 which is carried between two arms 3, 4 and rigidly held in position by means oia cap-shaped piece 5. Both arms 3 and 4 fixedly carry at their forward ends two collars 6, I through which bar 8 may slide.

Two bosses, 9, It provided on one side of the collars 6, l have vertically tapped passageways, which are in alignment with each other and engage a substantially vertically arranged screw spindle l l extending through said passageways.

On one side of bar 8, there are disposed two flanges l2, I3 which serve as bearings for the spindle H. A crank Ill secured to the upper end of the screw-spindle ll permits rotation of the lat- During the tillage, the device hereinabove de scribed is adapted to connect a tractor 20' with the beam l of the plough in the following manner: When it is necessary to modify the'deptlr of the tillage itch, the crank I4 is actuated so as to move the screw spindle ll which according to the direction of rotation raises or lowers the" two bosses 3, l0 which are rigid with the arms 3, 4 which in turn support the beam l of the plough,

thus diminishing or increasing the depth' oi ploughing.

If the plough is to be detached from the tractor, it suflices to withdraw the pin l1.

In Figs. 5 and 6, the sleeve 2 has the shape'of 9 a socket provided at both ends with ball bearings 22, 23 or other suitable bearings in which the end of the beam 1 is journaled. The part of beam l projecting beyond the ballbearing'22, is of circular cross-section and carries a collar 24 which is secured thereto by means of a pin 25 and is provided with a flange 26 abutting against the ballbearing 22 in order to fix the position of thebeam in its axial direction.

The beam is preferably provided with a crank-; shaped portion so that the centre of gravity of the plough is near to its pivoting axis, thus facilif tating its turn around. i

A pawl lever 21 engaging alternately with projecting catch 28 or 29 welded on cap-shaped piece 5 serves to turn the plough and to set it into one;

of its two extreme positions.

The lever 21 is fixed to the extremity of nit;

beam l by a bolt 38 which connects lug 3| inte'- gral with the said lever 21, to the beam I; A coil; spring 32 extending on guide rod 32 which is piv oted to the lever 2'! by means of a pin 34, exerts a pressure against the lever 21 which is thus held between 'catch 28 or 29.

In order to adjust the position of the beam and, consequently, the width of the furrow, two arms 35, 36 are provided which are carried by transverse plates 31, 38, to which arm 36 is affixed permanently whereas arm 35 is removably attached to said plate by means of bolts and screws 39, 40. The bolt 39 passes through a curved slotv 4| provided in the plate 31 so that by unscrewing this bolt 39, the arm 35 which is rigidly connected to the end of the beam I can pivot with respect to the arm 36 which forms a rigid connection with the plough. Thus, by locking said bolt, the plough is fixed in adjusted position. A bracket 42 is rigid with arm 35 to support guide rod 33 carrying the spring 32.

When it is necessary to turn the plough at the end of a furrow, it suffices to exert a pressure on the lever 21 to cause disengagement of the lever from the catch 28 in which said lever is engaged, and then to turn it through 180. The entire plough then turns around its axis passing through the beam. The plough and the device described are so designed that the turning parts are well balanced and only a small effort is required to impart this rotating movement.

In Figs. 7 and 8, the arm 3 of the sleeve 2 is provided with two hooks 43, 44 connected by two chains 45, 46, to two pins 41, 48 carried by two cranks 49, 50 which are turned by means of a worm wheel 5| with which said cranks are fixedly connected by means of shaft 52. A worm 53 mounted on a shaft 54 causes the worm wheel 5| to turn. The shaft 54 is driven by the engine of the tractor 20 and runs' in bearings 55, 56 mounted in a frame 57.

During the ploughing, the device represented is utilized in the following manner, when it is necessary to lift the plough to effect its turn around, as explained with reference to Figs. 5 and 6. The shaft 54 is coupled to the engine of the tractor, which revolves and thereby actuates the worm 20. The latter drives the Worm wheel 5| which rotates the cranks 49 and 50. These cranks then pull the chains 45, 46, thereby causing bar 8 to pivot about pin [1. The sleeve 2 is thus lifted together with the beam 1 fitted in said sleeve and with the latter the remainder of the plough which is rigid with said beam When the sleeve 2 is raised, the plough is turned, as explained hereinbefore, and put back into position, i. e. lowered again upon inverse operation of the cranks 49, 50, to plough a new furrow. During the ploughing, the chains 45, 46 are not stretched and. they automatically bring back the plough to the axis of the tractor during the lifting operation.

; The lifting device may be equipped with one crank 49 or any other eccentric member. It can thus be seen that in accordance with the invention there has been provided a coupling device for connecting an implement trailingly behind a power driven tractor comprising a substantially upright bar, means supporting said bar and connected to said implement, a rotatable spindle extending along and generally parallel to said bar and supported thereby, said spindle threadedly engaging said supporting means so that rotation of said spindle displaces said supporting means with respect to said bar, a rod member pivoted to said bar with the pivotal axis horizontal, whereby said bar may be swung about said pivotal axis relatively to said rod member, said rod member extending forwardly to said tractor, a vertical pivot pin on said tractor pivotally connecting said rod member to said tractor, and guide means on said tractor and engaging said rod member between said vertical pivot pin and said bar for horizontal swinging movement of said rod member with respect to said tractor.

While the invention has been illustrated and described in great detail in the drawings and foregoing description, the same is to be considered as merely illustrative and by no means in a limitative sense.

The several modifications described herein, as well as others which will readily suggest themselves to persons skilled in this art, all considered to be within the broad scope of the invention, reference being had to the appended claim.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

A coupling device for connecting an implement trailingly behind a power driven tractor comprising a substantially upright bar, means supporting said bar and connected to said implement, a rotatable spindle extending along and generally parallel to said bar and supported thereby, said spindle threadedly engaging said supporting means so that rotation of said spindle displaces said supporting means with respect to said bar, a rod member pivoted to said bar with the pivotal axis horizontal, whereby said bar may be swung about said pivotal axis relatively to said rod member, said rod member extending forwardly to said tractor, a vertical pivot pin on said tractor pivotally connecting said rod member to said tractor, and guide means on said tractor and engaging said rod member between said vertical pivot pin and said bar for horizontal swinging movement of said rod member with respect to said tractor.

PAUL HENRIOD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,467,894 Dubois Sept. ll, 1923 1,800,284 Delaye Apr. 14, 1931 1,807,731 Ehricke June 2, 1931 1,864,639 Crezee June 28, 1932 2,312,424 Lentz Mar. 2, 1943 FOREIGN PATENTS Number Country Date 3,871 Switzerland Oct. 2, 1891 129,544.- Great Britain July 17, 1919 174,033 Germany July 30, 1906 186,466 Switzerland Dec. 1, 1936 207,138 Germany Feb. 23, 1909 660,922 France Feb. 26, 1929 

